CN203037611U - On-line detection device of integrated multi-parameters for electrolyzed functional water - Google Patents
On-line detection device of integrated multi-parameters for electrolyzed functional water Download PDFInfo
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- CN203037611U CN203037611U CN 201320052276 CN201320052276U CN203037611U CN 203037611 U CN203037611 U CN 203037611U CN 201320052276 CN201320052276 CN 201320052276 CN 201320052276 U CN201320052276 U CN 201320052276U CN 203037611 U CN203037611 U CN 203037611U
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Abstract
The utility model relates to an on-line detection device of integrated multi-parameters for electrolyzed functional water. The on-line detection device comprises a detection unit and an electronic unit, wherein the detection unit consists of a sensor and a flow cell, and the electronic unit consists of a signal conditioning circuit, an analog/digital converter, a single chip microcomputer system, a data communication interface circuit, a keyboard, an LCD (Liquid Crystal Display) and a power supply; each parameter signal of the electrolyzed functional water acquired by the detection unit is converted, amplified and filtered by the signal conditioning circuit, is converted into a digital signal through the analog/digital converter, and then is sent to the single chip microcomputer system through the interface, and the data is subjected to processing treatment, computational analysis and a series of work by the single chip microcomputer, and is sent to the LCD through the interface; and the electronic unit is in data communication with a PC (Personal Computer) at a monitoring center through MAX232 and/or 485 standard interfaces to complete more complex measurement and control tasks.
Description
(1) technical field
The present invention relates to a kind of integral multi-parameter on-line measuring device for electrolyzed functional water, belong to the electrolyzed functional water apparatus field.
(2) background technology
Environment friendly agricultural---electrolyzed functional water is called as the magic water of 21 century, be that water is placed a kind of special device, add small amount of electrolyte, through electric field treatment, make water pH value, oxidation-reduction potential (ORP value), effective chlorine density parameters such as (ACC) changes and the acidic electrolytic water with specific function that produces and the general name of electrolyzed alkaline water.Domestic and international many scholars are paying close attention to its mechanism of action and effect.Through a large amount of verification experimental verifications, electrolyzed functional water has effects such as disease-resistant, diseases prevention, volume increase to crop, and simultaneously, it can reduce the consumption of chemical fertilizer and agricultural chemicals significantly, with electrolyzed functional water instead of chemical pesticide control plant disease, it is a new way of control of plant disease.
The electrolyzed functional water technology mainly is to produce effective chlorine by the chloride electrolyte lean solution of electrolysis to suppress or the killing pathogenic bacteria microorganism, plays disease-resistant, prophylaxis effect.Therefore key issue is exactly the problem of effective chlorine in the electrolyzed functional water technology, i.e. the productive rate size of effective chlorine and influence factor thereof (as pH value, ORP value, temperature etc.); The problems such as factor of attenuation process, rule and the influence decay thereof of effective chlorine in electrolyzed functional water.In addition, a lot of parameter control all will be used effective chlorine density in the electrolyzed functional water technology, all need to know effective chlorine density in the electrolyzed functional water such as the adjusting of decomposition voltage size, chloride electrolyte lean solution quantity delivered, chloride concentration of electrolyte solutions, former water quantity delivered etc.And find fast, accurately, effective chlorine density, pH value, ORP value, method of temperature convenient, that efficiently measure electrolyzed functional water be carry out above-mentioned work sutdy basic and crucial.
At present more for the assay method of effective chlorine density, as iodometry, DPD(N, N-diethyl-1,4-phenylenediamine) spectrophotometric method, methyl orange spectrophotometric method, anion exchange separation, electric conductivity detector, iodide ion select electrode indirect method etc.But mostly these methods are to be used for the mensuration of fresh water effective chlorine such as potable water, industrial waste water, sanitary sewage in the laboratory, and still not enough to the research of effective chlorine density in the online detection electrolyzed functional water.Though at present online residual chlorine detecting instrument device is arranged, can not detect pH value, ORP value and temperature value simultaneously, can only detect residual chlorine concentration, and the residual chlorine concentration sensing range is less, generally only be 0 ~ 20mg/l.
Therefore, at present many checkout equipments of online detection needs of effective chlorine density, pH value, ORP value and the temperature of electrolyzed functional water are worked to finish simultaneously, the cost height, complicated operation, workload is big.Therefore be necessary to research and develop the integrated on-line measuring device of a kind of easy to use, cheap, the effective chlorine density that can measure electrolyzed functional water fast, pH value, ORP value, temperature.
(3) summary of the invention
The present invention is directed to prior art can not satisfy effective chlorine density, pH value, ORP value and the temperature of measuring electrolyzed functional water simultaneously and detect the high defective of cost, a kind of integral multi-parameter on-line measuring device for electrolyzed functional water is provided, can have accurately measured effective chlorine density, pH value, ORP value and temperature simultaneously.
A kind of integral multi-parameter on-line measuring device for electrolyzed functional water comprises detecting unit and electronic unit;
Described detecting unit is made up of effective chlorine sensor, pH sensor, ORP sensor, temperature sensor and flow cell.Described effective chlorine sensor, pH sensor, ORP sensor and temperature sensor are installed in the flow cell, the signal output part of four sensors respectively with electronic unit in corresponding four signal conditioning circuits be connected; Described flow cell is installed on the water outlet side pipe of the electrolyzed functional water generation system in parallel with the water outlet trunk line of electrolyzed functional water generation system, and guarantees to be full of in the flow cell electrolyzed functional water.
Described effective chlorine sensor is that commercially available any measurement range is the constant voltage type effective chlorine sensor of 0 ~ 200mg/l; Described pH sensor is that commercially available any measurement range is 0 ~ 14, and zero potential is the pH sensor of 7pH; Described ORP sensor be commercially available any measurement range for-2000mV ~+the ORP sensor of 2000mV; Described temperature sensor is commercially available any temperature sensor, and temperature sensor can be to be installed in independently in the flow cell, also can be built in described effective chlorine sensor or pH sensor or the ORP sensor.
Described electronic unit is made of signal conditioning circuit, A/D converter, keyboard, LCD display, Single Chip Microcomputer (SCM) system, data communication interface circuit and power supply; Described signal conditioning circuit is connected with Single Chip Microcomputer (SCM) system through A/D converter; Described LCD display, keyboard and data communication interface circuit all are connected with Single Chip Microcomputer (SCM) system; Described Single Chip Microcomputer (SCM) system is powered by power supply, and is provided with the full duplex serial communication port.
Described signal conditioning circuit is made of effective chlorine density signal conditioning circuit, pH value signal modulate circuit, ORP value signal modulate circuit and temperature signal regulation circuit.Described effective chlorine signal conditioning circuit links to each other with the signal output part of effective chlorine sensor, the current signal of effective chlorine sensor output is nursed one's health into meet the voltage signal that the A/D converter sampled voltage requires; Described pH value signal modulate circuit links to each other with the signal output part of pH sensor, the positive/negative voltage signal of pH sensor output is lifted to meet the positive voltage signal that the A/D converter sampled voltage requires; Described ORP value signal modulate circuit links to each other with the output line of ORP sensor, the positive/negative voltage signal of ORP sensor output is lifted to meet the positive voltage signal that the A/D converter sampled voltage requires; Described temperature signal regulation circuit links to each other with the output line of temperature sensor, the voltage signal of temperature sensor output is nursed one's health into meet the voltage signal that the A/D converter sampled voltage requires.
Described effective chlorine density signal conditioning circuit comprises constant potential control circuit, I/V change-over circuit, differential amplifier circuit (II) and low-pass filter circuit (III); Described constant potential control circuit by reference voltage circuit (I), be used for preventing that the fixed resistance R13 of feedback open loop, the elements such as capacitor C 10, impact damper IC1 and operational amplifier IC3 that are used for phase compensation from constituting; Described reference voltage circuit (I) is made up of reference voltage source A, reverser B and impact damper IC2; Described I/V change-over circuit is made of precision resistance R15; Described differential amplifier circuit (II) is made of impact damper IC4, IC5 and operational amplifier IC6 and other element; Described low-pass filter circuit (III) is used for the filtering high frequency interference.
Described pH value signal modulate circuit comprises amplifying circuit (IV), adding circuit (V), voltage stabilizing and filtering circuit (VI); Described amplifying circuit (IV) is characterized in that being made of fixed resistance R38, R39, R41 and operational amplifier IC7; Described adding circuit (V) is used for the positive/negative voltage signal of pH sensor output is lifted to positive level; Described voltage stabilizing and filtering circuit (VI) are used for output stable voltage signal and filtering high frequency interference.
Described ORP value signal modulate circuit comprises amplifying circuit (VII), adding circuit (VIII), voltage stabilizing and filtering circuit (IX); Described amplifying circuit (VII) is characterized in that being made of fixed resistance R29 and operational amplifier IC8; Described adding circuit (VIII) is used for the positive/negative voltage signal of ORP sensor output is lifted to positive level; Described voltage stabilizing and filtering circuit (IX) are used for output stable voltage signal and filtering high frequency interference.
Described temperature signal regulation circuit is made up of fixed resistance R50, R51, R52, R53, R54, R55, R56 and operational amplifier IC12.
Described A/D converter is the well behaved A/D converter of commercially available any input channel number 〉=4, and its function is to convert the voltage analog signal after the signal conditioning circuit conditioning to digital signal, handles for Single Chip Microcomputer (SCM) system.
Described keyboard comprises six press keys, is respectively " setting ", " affirmation ", " making progress ", " downwards ", " left ", " to the right ", can realize to functions such as Single Chip Microcomputer (SCM) system input data, transmission orders; Press " setting " key, enter Zero calibration and slope calibration interface to effective chlorine sensor, pH sensor and ORP sensor, finish the key entry of calibrating parameters by " making progress ", " downwards ", " left ", " to the right " button, demarcate and finish the back and press " affirmation " key and store calibrating parameters; Press " affirmation " key again, LCD display begins to show detected effective chlorine density, pH value, ORP value and temperature.
Described Single Chip Microcomputer (SCM) system is commercially available any 51 kernel single-chip microcomputers and more high performance single-chip microcomputer.Single-chip microcomputer is the core of this device, its function is that the digital signal of effective chlorine density, pH value, ORP value and temperature that A/D converter is converted to is handled, by the corresponding relation of effective chlorine density, pH value, ORP value and temperature and its signal conditioning circuit output voltage, calculate effective chlorine density value, pH value, ORP value and temperature value.
Described LCD display is commercially available any 128 * 64 dot matrix lcd modules, in order to show effective chlorine density value, pH value, ORP value and temperature value.
Described data communication interface circuit employing MAX232 and/or 485 standard interfaces formation single-chip microcomputer are communicated by letter with PC.
Described power supply is the direct supply of 5V ~ 24V.
Each parameter (effective chlorine density of the electrolyzed functional water that described electronic unit collects detecting unit, the pH value, ORP value and temperature) signal carries out conversion by signal conditioning circuit, amplify, filtering, processing such as compensation, convert digital signal to through A/D converter, send into Single Chip Microcomputer (SCM) system by interface again, by single-chip microcomputer the input data are processed processing, a series of activities such as computational analysis, deliver to LCD display by interface, and can adopt MAX232 and/or 485 standard interfaces to realize the data communication of electronic unit and Surveillance center's PC, finish more complicated measurement and control task.
Beneficial effect of the present invention is:
A kind of effective chlorine density for electrolyzed functional water that the present invention relates to, pH value, ORP value and thermometric integrated on-line measuring device, problems of the prior art have been overcome, it is advantageous that: first, this pick-up unit is easy for installation, simple to operate, can realize the measurement fast, easily of effective chlorine density, pH value, ORP value and the temperature of electrolyzed functional water simultaneously; The second, this pick-up unit can show by LCD effective chlorine density value, pH value, ORP value and the temperature value of electrolyzed functional water with the numerical value correspondence, has conveniently, accurate, practical good effect; The 3rd, data communication system is made up of MAX232 and/or 485 standard interfaces, realizes the data communication of electronic unit and Surveillance center's PC.
(4) description of drawings
Fig. 1 is one-piece construction block diagram of the present invention.
Fig. 2 is the effective chlorine density signal conditioning circuit figure among the present invention.
Fig. 3 is the pH value signal modulate circuit figure among the present invention.
Fig. 4 is the ORP value signal modulate circuit figure among the present invention.
Fig. 5 is the temperature signal regulation circuit diagram among the present invention.
Fig. 6 is output voltage signal and effective chlorine density relation curve among the present invention.
Among the figure, 1. flow cell, 2. effective chlorine sensor, 3.pH sensor, 4. signal conditioning circuit, 5. A/D converter, 6. Single Chip Microcomputer (SCM) system, 7. power supply, 8. data communication interface circuit, 9.LCD display, 10. electronic unit box body, 11. keyboards, 12.ORP sensor, 13. temperature sensors, 14. detecting units, 15. the water outlet side pipe of electrolyzed functional water generation system, the water outlet trunk line of 16. electrolyzed functional water generation systems.
I. reference voltage circuit, II. differential amplifier circuit, III. low-pass filter circuit, IV. amplifying circuit, V. adding circuit, VI. voltage stabilizing and filtering circuit, VII. amplifying circuit, VIII. adding circuit, IX. voltage stabilizing and filtering circuit.
(5) embodiment
Now in conjunction with diagram, the preferred embodiments of the present invention are described in detail.
In Fig. 1, effective chlorine sensor (2), pH sensor (3), ORP sensor (12) and temperature sensor (13) are installed in the flow cell (1), and form detecting unit (14).During measurement, flow cell (1) is installed on the water outlet side pipe (15) of the electrolyzed functional water generation system in parallel with the water outlet trunk line (16) of electrolyzed functional water generation system, effective chlorine sensor (2), pH sensor (3), ORP sensor (12) and the detected simulating signal of temperature sensor (13) are delivered in the signal conditioning circuit (4) corresponding in electronic unit (10) box body by output line.
Electronic unit (10) box body is fixed on the position near detecting unit (14), includes signal conditioning circuit (4), A/D converter (5), Single Chip Microcomputer (SCM) system (6), data communication interface circuit (8), keyboard (11), LCD display (9) and power supply (7).Each parameter (effective chlorine density of the electrolyzed functional water that electronic unit collects detecting unit (14), the pH value, ORP value and temperature) signal carries out conversion by signal conditioning circuit (4), amplify, filtering, processing such as compensation, convert digital signal to through A/D converter (5), send into Single Chip Microcomputer (SCM) system (6) by interface again, by single-chip microcomputer the input data are processed processing, a series of activities such as computational analysis, deliver to LCD display (9) by interface, and pass through the data communication that data communication interface circuit (8) is realized electronic unit and Surveillance center's PC, finish more complicated measurement and control task.
In Fig. 2, the effective chlorine sensor is the three-electrode electro Chemical sensor, comprises working electrode WE, auxiliary electrode CE and contrast electrode RE.During measurement, between working electrode WE and contrast electrode RE, add a constant potential, then just having current signal in the loop of working electrode WE and auxiliary electrode CE composition produces, this current signal and effective chlorine density have certain relation, outer signal Acquisition Circuit and corresponding conversion, output circuit on the effective chlorine sensor, just can realize the measurement to this current signal, analyze the concentration value that this current signal just can be calculated effective chlorine.The effective chlorine density signal conditioning circuit comprises constant potential control circuit, I/V change-over circuit, differential amplifier circuit (II) and low-pass filter circuit (III); The reference voltage circuit (I) that described constant potential control circuit is made up of reference voltage source A, reverser B, impact damper IC2, be used for preventing the fixed resistance R13 of feedback open loop, the capacitor C 10 that is used for phase compensation, impact damper IC1, operational amplifier IC3 and other element constitute; Described I/V change-over circuit is made of precision resistance R15; Described differential amplifier circuit (II) is made of impact damper IC4, IC5 and operational amplifier IC6 and other element; Described low-pass filter circuit (III) is used for the filtering high frequency interference.
In Fig. 3, the pH sensor comprises potential electrode 1 and contrast electrode 2, and pH value signal modulate circuit comprises amplifying circuit (IV), adding circuit (V), voltage stabilizing and filtering circuit (VI); Described amplifying circuit (IV) is made of fixed resistance R38, R39, R41 and operational amplifier IC7; Described adding circuit (V) is used for the positive/negative voltage signal of pH sensor output is lifted to positive voltage signal; Described voltage stabilizing and filtering circuit (VI) are used for output stable voltage signal and filtering high frequency interference.
In Fig. 4, the ORP sensor comprises potential electrode 2 and contrast electrode 1, and ORP value signal modulate circuit comprises amplifying circuit (VII), adding circuit (VIII), voltage stabilizing and filtering circuit (IX); Described amplifying circuit (VII) is made of fixed resistance R29 and operational amplifier IC8; Described adding circuit (VIII) is used for the positive/negative voltage signal of ORP sensor output is lifted to positive voltage signal; Described voltage stabilizing and filtering circuit (IX) are used for output stable voltage signal and filtering high frequency interference.
In Fig. 5, that temperature sensor adopts is platinum resistance PT1000, and the temperature signal regulation circuit is made up of fixed resistance R50, R51, R52, R53, R54, R55, R56 and operational amplifier IC12.
The present invention is directly installed on pick-up unit on the production line of electrolyzed functional water generation system, detects effective chlorine density, pH value, ORP value and temperature in real time by soft-measuring technique, instructs production better with this.The course of work that this pick-up unit detects effective chlorine density is as follows: flow cell (1) is installed on the water outlet side pipe (15) of the electrolyzed functional water generation system in parallel with the water outlet trunk line (16) of electrolyzed functional water generation system, effective chlorine sensor (2), pH sensor (3), ORP sensor (12) and temperature sensor (13) are installed in the flow cell (1) that is full of electrolyzed functional water.During measurement, add a constant potential between the working electrode WE of effective chlorine sensor (2) and contrast electrode RE, measured matter and working electrode react, and measure the current signal that auxiliary electrode CE produces simultaneously, according to Ilkovic equation: I=nAFDc/﹠amp; The intensity of this current signal is directly proportional with effective chlorine density in the electrolyzed functional water, this electric current produces voltage drop when flowing through among Fig. 2 R15, convert the differential voltage signal at R15 two ends to over the ground single-ended voltage signal and amplify through differential amplifier circuit (II) again, then by low-pass filter circuit (III) filtering high frequency interference, output voltage signal to A/D converter (5) at last, Fig. 6 is output voltage signal and effective chlorine density relation curve.A/D converter (5) converts voltage analog signal to digital signal, send into Single Chip Microcomputer (SCM) system (6) by interface again, single-chip microcomputer carries out analytical calculation according to the electric signal of the content generation of effective chlorine in the water, shows analog value by LCD display (9) with numeral.
The present invention is provided with data processing and functions such as storage, man-machine interface, data communication and data acquisition.The data storage can be adopted on-chip memory or chip external memory; Man-machine interface is that keyboard input and LCD show that the user can pass through the keyboard operation of control system easily, can also be by the operation conditions of display interface observing system; Data communication adopts MAX232 and/or 485 standard interfaces to constitute the communication of electronic unit and Surveillance center's PC; What sensor adopted is constant voltage type effective chlorine sensor, pH sensor, ORP sensor, temperature sensor; Signal conditioning circuit comprises constant potential control circuit, I/V change-over circuit, amplifying circuit, adding circuit, voltage stabilizing and filtering circuit.The technical scheme that adopts: the main part of pick-up unit is in insulation crust, and sensor and erecting device are in the insulation crust outside.Effective chlorine sensor, pH sensor, ORP sensor and temperature sensor are installed in the flow cell, the signal output part of four sensors respectively with electronic unit in corresponding four signal conditioning circuits be connected.Flow cell is installed on the water outlet side pipe of the electrolyzed functional water generation system in parallel with the water outlet trunk line of electrolyzed functional water generation system, and guarantees to be full of in the flow cell electrolyzed functional water.After the pick-up unit energising, each parameter (effective chlorine density of the electrolyzed functional water that electronic unit collects detecting unit, the pH value, ORP value and temperature) signal carries out conversion by signal conditioning circuit, amplify, filtering, processing such as compensation, convert digital signal to through A/D converter, send into Single Chip Microcomputer (SCM) system by interface again, by single-chip microcomputer the input data are processed processing, a series of activities such as computational analysis, deliver to LCD display by interface, and can adopt MAX232 and/or 485 standard interfaces to realize the data communication of electronic unit and Surveillance center's PC, finish more complicated measurement and control task.
Claims (1)
1. an integral multi-parameter on-line measuring device that is used for electrolyzed functional water is characterized in that being made up of detecting unit and electronic unit; Described detecting unit is made up of effective chlorine sensor, pH sensor, ORP sensor, temperature sensor and flow cell; Described effective chlorine sensor, pH sensor, ORP sensor and temperature sensor are installed in the flow cell; Described flow cell is installed on the water outlet side pipe of the electrolyzed functional water generation system in parallel with the water outlet trunk line of electrolyzed functional water generation system; Described temperature sensor independently is installed in the flow cell or is built in described effective chlorine sensor or pH sensor or the ORP sensor;
Described effective chlorine sensor measurement scope 0 ~ 200mg/l; The measurement range of described pH sensor is 0 ~ 14, zero potential is 7pH; Described ORP sensor measurement scope is-2000mV ~+2000mV;
Described electronic unit is made of signal conditioning circuit, A/D converter, keyboard, LCD display, Single Chip Microcomputer (SCM) system, data communication interface circuit and power supply; Described signal conditioning circuit is connected with Single Chip Microcomputer (SCM) system through A/D converter; Described LCD display, keyboard and data communication interface circuit all are connected with Single Chip Microcomputer (SCM) system; Described Single Chip Microcomputer (SCM) system is provided with the full duplex serial communication port;
Described signal conditioning circuit is made of effective chlorine density signal conditioning circuit, pH value signal modulate circuit, ORP value signal modulate circuit and temperature signal regulation circuit; Described effective chlorine signal conditioning circuit links to each other with the signal output part of effective chlorine sensor; Described pH value signal modulate circuit links to each other with the signal output part of pH sensor; Described ORP value signal modulate circuit links to each other with the signal output part of ORP sensor; Described temperature signal regulation circuit links to each other with the signal output part of temperature sensor;
Described effective chlorine density signal conditioning circuit comprises constant potential control circuit, I/V change-over circuit, differential amplifier circuit (II) and low-pass filter circuit (III); Described constant potential control circuit is made of reference voltage circuit (I), the fixed resistance R13 that is used for preventing feedback open loop, the capacitor C 10 that is used for phase compensation, impact damper IC1 and operational amplifier IC3; Described reference voltage circuit (I) is made up of reference voltage source A, reverser B and impact damper IC2; Described I/V change-over circuit is made of precision resistance R15; Described differential amplifier circuit (II) comprises impact damper IC4, IC5 and operational amplifier IC6;
Described pH value signal modulate circuit comprises amplifying circuit (IV), adding circuit (V), voltage stabilizing and filtering circuit (VI); Described amplifying circuit (IV) is made of fixed resistance R38, R39, R41 and operational amplifier IC7; Described adding circuit (V) is used for the positive/negative voltage signal of pH sensor output is lifted to positive level; Described voltage stabilizing and filtering circuit (VI) are used for output stable voltage signal and filtering high frequency interference;
Described ORP value signal modulate circuit comprises amplifying circuit (VII), adding circuit (VIII), voltage stabilizing and filtering circuit (IX); Described amplifying circuit (VII) is made of fixed resistance R29 and operational amplifier IC8;
Described temperature signal regulation circuit is made up of fixed resistance R50, R51, R52, R53, R54, R55, R56 and operational amplifier IC12;
Described A/D converter input channel number 〉=4;
Described keyboard comprises six press keys, is respectively " setting ", " affirmation ", " making progress ", " downwards ", " left ", " to the right ", and described Single Chip Microcomputer (SCM) system is 51 kernel single-chip microcomputers or more high performance single-chip microcomputer;
Described data communication interface circuit employing MAX232 and/or 485 standard interfaces formation single-chip microcomputer are communicated by letter with PC.
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| CN 201320052276 CN203037611U (en) | 2013-01-30 | 2013-01-30 | On-line detection device of integrated multi-parameters for electrolyzed functional water |
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| CN 201320052276 CN203037611U (en) | 2013-01-30 | 2013-01-30 | On-line detection device of integrated multi-parameters for electrolyzed functional water |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758904A (en) * | 2015-11-27 | 2016-07-13 | 北京中昌天盛科技有限公司 | Multi-parameter water quality monitoring system and method and their application |
| CN109477811A (en) * | 2016-06-16 | 2019-03-15 | 哈希公司 | Chlorine, oxidation-reduction potential (ORP) and PH measure probe |
| CN109839415A (en) * | 2019-02-14 | 2019-06-04 | 扬州贝福德医健技术有限公司 | A kind of multi-purposed interface circuit of rapid blood sugar test instrument |
-
2013
- 2013-01-30 CN CN 201320052276 patent/CN203037611U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758904A (en) * | 2015-11-27 | 2016-07-13 | 北京中昌天盛科技有限公司 | Multi-parameter water quality monitoring system and method and their application |
| CN109477811A (en) * | 2016-06-16 | 2019-03-15 | 哈希公司 | Chlorine, oxidation-reduction potential (ORP) and PH measure probe |
| CN109839415A (en) * | 2019-02-14 | 2019-06-04 | 扬州贝福德医健技术有限公司 | A kind of multi-purposed interface circuit of rapid blood sugar test instrument |
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